Frequency domain ride control for low bandwidth active suspension systems
First Claim
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1. A system for actively controlling the suspension of a vehicle comprising:
- a plurality of adjustable struts;
an actuator coupled to the plurality of struts to effectuate adjustment thereof;
a plurality of displacement sensors, each displacement sensor configured to measure a displacement of one strut of the plurality of struts and generate strut relative displacement signals based on the displacement measured;
a controller in electrical communication with the plurality of sensors, wherein the controller is configured to determine a first frequency amplitude for heave, pitch, or roll of the vehicle based on the strut relative displacement signals and to actuate the actuator based thereon to control and adjust the suspension of the vehicle.
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Abstract
The present invention provides a system and method for actively controlling the suspension of a vehicle. The system includes struts for providing an adjustable suspension to the vehicle, sensors to measure the strut relative displacement, and a controller configured to determine the frequency amplitude for the heave, pitch, or roll of the vehicle based on the strut relative displacement and manipulate the struts in response thereto.
35 Citations
27 Claims
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1. A system for actively controlling the suspension of a vehicle comprising:
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a plurality of adjustable struts;
an actuator coupled to the plurality of struts to effectuate adjustment thereof;
a plurality of displacement sensors, each displacement sensor configured to measure a displacement of one strut of the plurality of struts and generate strut relative displacement signals based on the displacement measured;
a controller in electrical communication with the plurality of sensors, wherein the controller is configured to determine a first frequency amplitude for heave, pitch, or roll of the vehicle based on the strut relative displacement signals and to actuate the actuator based thereon to control and adjust the suspension of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for actively controlling the suspension of a vehicle having adjustable struts and an actuator to adjust the struts, the method comprising:
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sensing a relative strut displacement of the suspension;
calculating a strut relative velocity based on the strut relative displacement;
calculating a body relative velocity based on the strut relative velocity;
extracting a first frequency amplitude based on the body relative velocity; and
actuating the actuator based on the first frequency amplitude. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification